Infection, usually by a virus, is the most common cause of lymph node swelling. Other causes include inflammatory diseases, abscesses, and cancer. ... This biopsy is done to find out why a node is swollen. ... Groin; Armpit; Neck; Under the jaw and chin; Behind the ears. ...
Soldering - Soldering has the same definition as brazing except for the fact that the filler metal used has a liquidus below 840Â°F (450Â°C) and below the solidus of the base metals.
1 In welding, the component pieces are melted together; in soldering, a softer metal with a lower melting point is used to connect them. 2  Because soldering doesn't melt components, it's useful for more delicate applications, such as electronics work, or plumbing. 3  The purpose of soldering is to bind two other components.